Susan points to the area where her father, James C, Mitchell Jr., was killed.

Margaret's family.

Ron's grandparents at the moment they saw their son's name on The Wall for the first time.

People leave incredible momentos at The Wall. This cake was made by Frankie Valle, son of Francisco Valle, to celebrate his father's birthday.

James C. Mitchell, Jr., Susan's father, who was in the Navy.

Margaret's father Robert Saavedra on his plane.

The 1st Battalion 9th Marines was an infantry battalion in Vietnam, where it had the highest casualty rate in Marine Corps history. Ron's father was in this battalion.

The only picture Mike has ever seen of himself with his parents.

Gold Star sons and daughters at a White House breakfast on Memorial Day 2014. Center, seated, is former U.S. Secretary of Defense Chuck Hagel, who served in Vietnam.

Margaret's father, Robert Saavedra.

Suzanne Sigona, winner of the 2015 Libby Hatch award, which recognizes outstanding commitment as a volunteer at the Vietnam Veterans Memorial. Suzanne will be with us during the trip.

USMC badge with the black ribbon, symbolizing remembrance or mourning.

Ron's father, PFC Ronald Reyes, USMC 1st battalion/ 9th Marines.

Margot's father, Air Force Captain John W. Carlson.

At The Wall, Robert Saavedra, Margaret's father. Sons and daughters of those who died in Vietnam are able to wash The Wall on Father's Day. When you rub a name after it's been washed, it emerges like this. Pretty amazing.

Margot's father in his F5-C.

At The Wall Ronald Reyes, Ron's father.

Patty's family in front of her father's flag.

HM1 Jack Young, Navy, Patty's father.

The last family picture taken before Margot's father left for Vietnam. Margot is on the left and her sister Kim is on the right.

At The Wall, Memorial Day 2014.

Army SP4 Curtis Earl Burkett, Mike's father.

At The Wall, James C. Mitchell, Susan's father.

Ron at about two years old, next to his father's grave.

A lighter from Margot's grandfather showing the Air Force base where his son was stationed.

Mike's parents in 1965, about a year after they were married.

Margaret and her three brothers in 1968.

Ron's father, left, with his unit in Vietnam.

Patty and her sister at The Wall.

Patty's father, Jack Young, playing guitar with his band "The Swerve Combo" aboard the USS Swerve.